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LT5525

5525f

High Linearity, Low Power

Downconverting Mixer

■

Wide Input Frequency Range: 0.8GHz to 2.5GHz*

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Typical Conversion Gain: –1.9dB at 1900MHz

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Single-Ended 50Ω RF and LO Interface

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Enable Function

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Point-to-Point Data Communication Systems

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High Linearity Receiver Applications

High Signal Level Frequency Downconversion

DESCRIPTIO

FEATURES

APPLICATIO S

TYPICAL APPLICATIO

The LT

for high linearity applications such as point-to-point data

transmission, high performance radios and wireless infra-

structure systems. The device includes an internally 50Ω

matched high speed LO amplifier driving a double-bal-

anced active mixer core. An integrated RF buffer amplifier

provides excellent LO-RF isolation. The RF input balun and

all associated 50Ω matching components are integrated.

The IF ports can be easily matched across a broad range

of frequencies for use in a wide variety of applications.

The LT5525 offers a high performance alternative to

passive mixers. Unlike passive mixers, which require high

LO drive levels, the LT5525 operates at significantly lower

LO input levels and is much less sensitive to LO power

level variations.

IF Output Power and IM3 vs

RF Input Power (Two Input Tones)

5525 TA01

BIAS

EN

LO INPUT

–5dBm

5V DC

0.01µF

1.2pF

100pF

150nH

4:1

150nH

1900MHz

GND

LT5525

140MHz

1900MHz

LNA

VGA

ADC

RF INPUT POWER (dBm/TONE)

–20

–100

–90

–70

–60

–50

0

–30

–15

–10

5525 TA02

–80

–20

IM3

–10

–40

–5

0

, LTC and LT are registered trademarks of Linear Technology Corporation.

*Operation over a wider frequency range is achievable with reduced performance.

Consult factory for more information.